Log In Log In  |  Checkout   |  72 item(s)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x WT-bac, Water Testing Kit, Bacteria Test
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x MK420, Maintenance kit for RO565
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
4 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch

View Cart$2,774.45
Specials Log InCreate Account Checkout  Shopping Cart72 item(s)
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 310, 2nd stage CTA 10 US Membrane filter
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x WT-bac, Water Testing Kit, Bacteria Test
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x MK420, Maintenance kit for RO565
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
2 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
4 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 752, DC Booster Pump w/ Transformer
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch

View Cart$2,774.45

ATEU, Tube Elbow Union Connector Fitting Tube OD Stem OD [ATEU]

$3.00

ATEU, Tube Elbow Union Connector Fitting Tube OD Stem OD



* ATEU, Tube Elbow Union Fitting Tube OD - Stem OD

* Please choose size from the selection box below. First number is tubing OD and second number is Stem OD Outside Diameter (Pipe sizes can be confusing even for the experienced user. Pipe size is not the actual outside or inside diameter of the pipe but is the industry accepted designation. If you have any question please email us first.)
* 1/4" Tube OD x 1/4" Stem OD ATEU0404
* 1/4" Tube OD x 3/8" Stem OD ATEU0406
* 3/8" Tube OD x 3/8" Stem OD ATEU0606
* 3/8" Tube OD x 1/2" Stem OD ATEU0607
* 1/2" Tube OD x 1/2" Stem OD ATEU0707


* Water & foods use: Products are manufactured from safe, non-toxic materials meeting the requirements of the US FDA, ERAS, ANSI/NSF-51,61, and SK Zert. Our products are widely used in water purification, food/beverage, and pneumatic systems.

* Function & Quality: Provides quick and convenient assembly-saving time & expense.

* Collet Design: Our unique oval collet design is superior and more practical, and is an improvement welcomed by our world wide customers in all industries.

* Additional Applications: Beyond water and food use, fittings can be used with air, gases, vacuum, & liquids. All connections can be assembled & disassembled repeatedly. A broad range of sizes covers a broad scope of applications.

* We carry different fittings in variation of sizes: 1/4", 3/8", or 1/2" adapters, connectors, fittings, or valves.  Most are not listed online, to avoid confusion to majority of RO system customers.  

* Send us a message with specification, intended application, and image of your setup or old fitting  to check if we have what you need. 

Available Options:

Size Combination:

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